Five weeks after a large aquarium burst in a Berlin hotel, about half of the acrylic pieces have been removed from the lobby, the building’s owner said on Saturday, while investigations continue into the cause of the accident. “So far we have about 50% of the acrylic elements, the smaller ones,” said Fabian Hellbusch, spokesperson for the building owner. The massive aquarium housing 1,500 fish in a hotel atrium near Berlin’s Alexanderplatz suddenly burst on December 16. The explosion sent a million litres of water pouring out of the destroyed acrylic glass tank into the hotel and onto the stre…